package com.sky.service.impl;


import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;

import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;


@Service
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WorkspaceService workspaceService;

    @Override
    public TurnoverReportVO getTurnoverReports(LocalDate begin, LocalDate end) {
        List<LocalDate> detaList = new ArrayList<>();
        detaList.add(begin);
        while (!begin.equals(end)){
            //日期计算
            begin = begin.plusDays(1);
            detaList.add(begin);
        }
        List<Double> turnoverList = new ArrayList<>();

        for (LocalDate date : detaList){
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap<>();
            map.put("begin", beginTime);
            map.put("end", endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnoverList.add(turnover);

        }

        TurnoverReportVO turnoverReportVO = TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(detaList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();

        return turnoverReportVO;
    }

    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        // 当前集合用于存放从begin到end范围内的每天的日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)){
            // 日期计算，计算指定日期的后一天对应的日期
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        // 存放新增用户数量 select count(id) from user where create_time > beginTime and create_time < endTime
        List<Integer> newUserList = new ArrayList<>();
        // 存放总用户数量 select count(id) from user where create_time < endTime
        List<Integer> totalUserList = new ArrayList<>();

        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap<>();
            map.put("end", endTime);
            // 查询总用户数量
            Integer totalUser = userMapper.countByMap(map);
            totalUserList.add(totalUser);

            map.put("begin", beginTime);
            // 查询新用户数量
            Integer newUser = userMapper.countByMap(map);
            newUserList.add(newUser);
        }

        // 封装返回结果
        return UserReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .newUserList(StringUtils.join(newUserList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .build();

    }

    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        // 当前集合用于存放从begin到end范围内的每天的日期
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)){
            // 日期计算，计算指定日期的后一天对应的日期
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        // 存放每天的订单总数
        List<Integer> orderCountList = new ArrayList<>();
        // 存放每天的有效订单数
        List<Integer> validOrderCountList = new ArrayList<>();
        // 查询每天的有效订单数，和订单总数
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

            // 查询每天的订单总数 select count(id) form orders where order_time > beginTime and order_time < endTime
            Integer orderCount = getOrderCount(beginTime, endTime, null);

            // 查询每天的有效订单数 select count(id) form orders where order_time > beginTime and order_time < endTime and Status = 5
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);

            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }

        // 计算时间区间内的订单总数量
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();

        // 计算区时间间内的有效订单数
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();

        // 计算订单完成率
        Double OrderCompletionRate = 0.0;
        if (totalOrderCount != 0){
            OrderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }

        return OrderReportVO
                .builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(OrderCompletionRate)
                .build();
    }

    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);

        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList = StringUtils.join(names, ",");

        List<Integer> numbers = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList = StringUtils.join(numbers, ",");

        return SalesTop10ReportVO
                .builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();

    }

    @Override
    public void exportBusinessData(HttpServletResponse response) {

        LocalDate DateBegin = LocalDate.now().minusDays(30);
        LocalDate DateEnd = LocalDate.now().minusDays(1);
        //查询数据库获取营业数据
        BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(DateBegin,LocalTime.MIN), LocalDateTime.of(DateEnd,LocalTime.MAX));

        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            XSSFWorkbook excel = new XSSFWorkbook(in);
            XSSFSheet sheet1 = excel.getSheet("Sheet1");
            sheet1.getRow(1).getCell(1).setCellValue("时间"+DateBegin+"至"+DateEnd);

            sheet1.getRow(3).getCell(2).setCellValue(businessData.getTurnover());
            sheet1.getRow(3).getCell(4).setCellValue(businessData.getOrderCompletionRate());
            sheet1.getRow(3).getCell(6).setCellValue(businessData.getNewUsers());

            sheet1.getRow(4).getCell(2).setCellValue(businessData.getValidOrderCount());
            sheet1.getRow(4).getCell(2).setCellValue(businessData.getUnitPrice());


            for (int i = 0; i < 30; i++) {
                LocalDate date = DateBegin.plusDays(i);
                BusinessDataVO data = workspaceService.getBusinessData(LocalDateTime.of(date,LocalTime.MIN), LocalDateTime.of(date,LocalTime.MAX));
                sheet1.getRow(7+i).getCell(1).setCellValue(date.toString());
                sheet1.getRow(7+i).getCell(2).setCellValue(data.getTurnover());
                sheet1.getRow(7+i).getCell(3).setCellValue(data.getValidOrderCount());
                sheet1.getRow(7+i).getCell(4).setCellValue(data.getOrderCompletionRate());
                sheet1.getRow(7+i).getCell(2).setCellValue(data.getUnitPrice());
                sheet1.getRow(7+i).getCell(2).setCellValue(data.getNewUsers());

            }



            ServletOutputStream outputStream = response.getOutputStream();
            excel.write(outputStream);

            outputStream.close();
            excel.close();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }



    }

    /**
     * 根据条件统计订单数量
     * @param begin
     * @param end
     * @param status
     * @return
     */
    private Integer getOrderCount(LocalDateTime begin, LocalDateTime end, Integer status){
        Map map = new HashMap<>();
        map.put("begin", begin);
        map.put("end", end);
        map.put("status", status);

        return orderMapper.countByMap(map);
    }
}
